Mrs. Warren's AP Statistics 1st Semester Exam

Front

What is a boxplot?

Back

A boxplot is a graphical representation of a dataset that displays the median, quartiles, and potential outliers. It summarizes the distribution of the data.

Front

What does the interquartile range (IQR) represent?

Back

The interquartile range (IQR) is a measure of statistical dispersion that represents the range between the first quartile (Q1) and the third quartile (Q3) in a dataset.

Front

What does a strong positive correlation indicate?

Back

A strong positive correlation indicates that as one variable increases, the other variable also tends to increase.

Front

What is the definition of skewness in a distribution?

Back

Skewness refers to the asymmetry of the probability distribution of a real-valued random variable. A distribution can be skewed to the left (negatively) or to the right (positively).

Front

What does it mean if a distribution is skewed to the right?

Back

If a distribution is skewed to the right, it means that the right tail (higher values) is longer or fatter than the left tail, indicating that there are a few high values that are pulling the mean to the right.

Front

How do you determine the correlation between two variables from a scatterplot?

Back

The correlation can be determined by observing the direction and strength of the relationship between the two variables plotted on the scatterplot.

Front

What is the significance of the median in a dataset?

Back

The median is the middle value of a dataset when it is ordered. It is a measure of central tendency that is less affected by outliers than the mean.

Front

What is a scatterplot?

Back

A scatterplot is a graph that shows the relationship between two quantitative variables, with one variable plotted along the x-axis and the other along the y-axis.

Front

What does it mean for a correlation to be close to 0?

Back

A correlation close to 0 indicates that there is little to no linear relationship between the two variables.

Front

What is the first quartile (Q1)?

Back

The first quartile (Q1) is the value that separates the lowest 25% of a dataset from the rest.